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drm/ssd130x: ensure ssd132x pitch is correct

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[ Upstream commit 229adcffdb54b13332d2afd2dc5d203418d50908 ]

The bounding rectangle is adjusted to ensure it aligns to
SSD132X_SEGMENT_WIDTH, which may adjust the pitch.  Calculate the pitch
after aligning the left and right edge.

Fixes: fdd591e00a ("drm/ssd130x: Add support for the SSD132x OLED controller family")
Signed-off-by: John Keeping <jkeeping@inmusicbrands.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250115110139.1672488-3-jkeeping@inmusicbrands.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
John Keeping
2025-01-15 11:01:38 +00:00
committed by Greg Kroah-Hartman
parent 5a3461ca54
commit 5ffb6b9a1a
1 changed files with 3 additions and 1 deletions
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drivers/gpu/drm/solomon/ssd130x.c
+3 -1
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@@ -1037,7 +1037,7 @@ static int ssd132x_fb_blit_rect(struct drm_framebuffer *fb,
struct drm_format_conv_state *fmtcnv_state)
{
struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev);
unsigned int dst_pitch = drm_rect_width(rect);
unsigned int dst_pitch;
struct iosys_map dst;
int ret = 0;
@@ -1046,6 +1046,8 @@ static int ssd132x_fb_blit_rect(struct drm_framebuffer *fb,
rect->x2 = min_t(unsigned int, round_up(rect->x2, SSD132X_SEGMENT_WIDTH),
ssd130x->width);
dst_pitch = drm_rect_width(rect);
ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
if (ret)
return ret;